Question #4fce5

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Answer 1 · 2018-02-03T10:51:41

Please see a step process below;

Since extra 45calories are burnt for each additional minute of the exercise..

Therefore;

$a)$ $x$ minutes $= 45x$ calories

$b)$ According to the question;

$3500$ calories is equivalent to $1$ pound of fat..

Hence;

$45x$ minutes calories $= 3500$ calories

$45x = 3500$

Divide both sides by $45$

$(45x)/45 = 3500/45$

$(cancel45x)/cancel45 = 3500/45$

$x = 3500/45$

$x =77.78 "mins per day"$

I.e the exercise will burn $1$ pound of fat per day after $77.78$ mins of the exercise..

In $30days$ for $1$ pound of fat to be burnt, the exercise should be done for;

$77.78/30 "min"s = 2.59 "mins"$

Hence, it should be $2.59$ mins each day in $30days$

Hope this helps!